Device for the prevention of the tilting movement of current collector bows



May 27, 1936. sZ f 1,760,795

DEVICE FOR THE PREVENTION OF THE TILTING MOVEMENT OF CURRENT COLLECTORBOWS Filed 001?- 18, 1928 2Sheets-Sheet l May 27, 1930. F. SZALAY1,760,795

DEVICE FOR THE PREVENTION OF THE TILTING MOVEMENT OF CURRENT COLLECTORBOWS Filed Oct. 18, 1928 2 Sheets-Sheet 2 Fdze; .Qy'

Patented May 27, 1939 oFrics FERENG SZALAY, OF BUDAFEEST, HUNGARY DEVICEFOR THE PREVENTION OF THE 'rrnrrim MOVEMENT on CURRENT COLLECTOR I BowsApplication filed Gcteber 18, 1928, Serial No. 313,344, and. in HungaryOctober 31, 1927.

damage the contact wire while allowing the 5 sa-meto move in a properdirection.

Such a device consists for instance of an abutment fixed on the trolleyframe below the how, but this abutment may be used only in trolley framedevices deflecting only in one direction and which abutment is to beturned together with the trolley frame about a vertically arranged axis,when the direction of the vehicle is to be changed. In trolley framesinclining in both directions only such arrangements are known for theprevention of the tilting in which the bow is fixed by means of awirerope or of rods having a spring to allow the tilting, in which casethe bow moving to the proper position with relation to theoverh'ead wirehas to move also these means and overcome the elasticity of the same.Besides, these means are disadvantageous in use, because joined with thebow they must be exchanged, when the bow is exchanged and because it isnecessary to correct continually these means, when the bow or'thetrolley frame is deformed.

The present invention removes the above explained faults by providing anabutment about the horizontally arranged axis of the bow, which abutmentguides said bow, whereby the bow may turn to the proper position. Theabutment guided in the manner of a parallelogram remains horizontalindependently of the position of the trolley frame and may be usedtherefore in trolley frames tilting in both directions.

According to the other form of the present invention the abutment isguided by the means of a pair of bevelled gears and a rod underinfluence of torsion, in this way preventing great disarrangement of theabut-- ment, besides it is possible in this arrangement to remove thetorsion rod together with the trolley frame from the support frame, sothat the exchange of the current collector frame may be quickly effectedin case of a damage or deformation.

The figures of the drawing show the invention, Fig. 1 showing the sideview of the first arrangement and Fig. 2 the front view of the samearranged on a trolley frame tilting in both directions. In the Fig. 3the tilting trolley frame is arranged not directly on the roof of thevehiclebut on a pantograph frame. The arrangement with the bevelledwheels is shown in a side and in a front View in the Figures 4 and 5arranged on a trolley frame which can deflect in both directions and inthe Figure 6 arranged on a pa-ntograph shown in the side views. i

As the Figures 1 and 2 show the current collector how a pivotallysupported by means of brackets 0 and .0 on the axis t which'is a part ofthe trolley frame Z the bow being secured against tilting by means ofthe abutment u supported on the axis 6 and having the form of adouble-armed lever, the points A and A of this lever being connected bythe means of wire ropes d and d to the points A and A of the supportframe. In order to insulate the wire-rope each rope is composed oftwoparts connected by means of an insulating-body e 6 Instead of thewire-ropes rods maybe used, but it is preferred to use only one rod,because the same may be put under pressure. The end parts of the rod maybe arranged also below the end parts of the trolley frame 76 in case theabutment at is provided with an arm directed inwards and the rod isconnected to this aim. In the Fig. 3 the trolley frame 70 is arranged ona pantograph p, in which the points A and A are provided on the lever 14the lower arm of which is secured by means of springs r and m in adetermined position. Also a rod could be used instead of the springs; inthis construction also a bushing is necessary sliding about the lowerarm of the lever u and these rods are then pivotally connected to thebushing and to the arms of the pantograph. I

In the Fig. 1 the abutment u and invtlie Fig. 3 the abutment M isparallelly arranged with the line connectingv the points A and A Thesprings r and 1, could be replaced also by weights.

It is remarked that in using a weight the axis of the lever need not liein the axis the same may be everywhere on the trol' wheel u togetherwith a pin 1) is supported on the axis t the toothed wheel having theform of an abutment. A toothed wheel in is secured to tube (5 by meansof screw 8. Tube d is'guided by the pin 6. Tube (i is non-rotatablyconnected to a tube al by a rod 2 which has a slot and wedge'c'onnectionwith tube (Z This wedge transmits the torsion from d; by means of therod 2 secured to (Z The rod .2 is preferably of an insulating materialin order to prevent the conduction of the current through the toothedwheels. On the lower axis 75 of the deflecting trolley frame 70 isarranged the pair ofthe bevel gears corresponding to the upper pair ofbevel gears a and n, but a is reversely arranged as in the front View,on the other side of the rod d; and fixed to thesupport m by the meansof the bolt "0 in. order to i hold in this way the upper abutment aalways in a parallel position to the lower a Between the upperabutment-u and the bow at is provided free room, which enables the bowto follow the of the conduct wire. I

The same arrangement is shown in the Figure 6 on a pantograph p, 'inwhich a pin a is provided on the lower abutment a The pin is to be heldin the vertical positionv by different undulations the means of abushing 0 sliding on the same and retaining it in a vertical position bymeans of rods Z Z connectedtd the bushing and to the arms of thepantogra-ph. The reference letters for theequi alent parts of thedevices are the same in the Figures 4, 5 and 6.. i I Y The pin of u inFigure G'may be retained in a vertical direction also, by the means of aweight jin which case the bushing 0 and the rods Z and Z are dispensedwith. Y

Prolonging the slit h shown in the Figure 5 to the end of the rod d therodsdg andcl will allow disconnection, when the'trolley frame of thecurrent collector is removed, whereby the device may be quickly removedand in case the bow sticks the tube (Z will be pushed down from thesupport frame of the current collector and theoverhead wire will not bebroken.

IVhat I claim is: V

1. A device for preventing'theoverturning of a collector bow rotatablyarranged on the trolley frame, including an abutmient arranged below thebow and spaced therefrom to permit a limited free swinging of the bow,

weer/e5 and means whereby the abutment is held in substantiallyhorizontal position independent of the inclination of the trolley frame.

2. A device for the prevention of the tilt- -1ng movement of a currentcollector bow as pivotally arranged on the trolley frame, comprising anabutment pivotally supported on thetrolley frame below the currentcollector bow and spaced therefrom to permit said how a limited freeswinging movement, and means intermediatethe trolley frame and theabutment to maintain the abutment in substan tially horizontal positionto prevent a tilting movement of the bow in excess of its permissiblefree swinging movement.

3. A device for the prevention of the tilting movement of a currentcollector bow as pivotally arranged on the trolley frame, comprising anabutment pivotally-supported on the trolley frame below the currentcollector bow and spaced therefrom to permit said how a lnnitedireeswinging movement, and means intermediate the trolley frame and theabutment to maintain the abutment in substantially horizontal positionto prevent a tilting ture; v

,FERENC SZALAY.

